I'm not quite sure how that file got to that state. Have you installed the latest version of Databridge V2? I've tried running the wizard and running the server behavior separately and my helpergroupsrulesphp.php file seems to be created properly.
Maybe it has something to do with running it for MySQL and then MySQLi and the file didn't get updated properly. I've fixed the file and attached it, so you can replace it manually, but I'd love to figure out what happened that caused it to prevent it from happening again if you could let me know everything you did and confirm the version of DataBridge you have installed that might help me track down the cause.